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Is kernel basically a large executable program ??
ruchika_sachdeva
Posts: 1
in Fedora
The kernel is basically a large executable program that runs in the background.
Is it true?
Secondly, Will the following command HIST=".bash_history" will assign the value .bash_history to the shell variable HIST??
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Comments
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ruchika_sachdeva wrote:The kernel is basically a large executable program that runs in the background.Will the following command HIST=".bash_history" will assign the value .bash_history to the shell variable HIST?
If the point of running that command was to set your Bash history file to $HOME/.bash_history, you should instead run export HISTFILE="~/.bash_history", where '~' is automatically substituted for your home directory by the shell.0 -
Well, not to split hairs, but the kernel is not strictly necessary. The kernel *is* the operating system, yes, and the kernel facilitates the user's ability to run multiple programs at once, and to interact with the computer's resources. However, it is not strictly necessary to operate a computer with an operating system or kernel. A computer user could always chose to load and run programs directly into the processor and peripherals, ala pre-1980's computing.
So, ruchika, yes, the kernel is a large executable program, in so much as any other operating system is. The benefit of a kernel (or any operating system) is that it allows for easier access to hardware resources by abstracting a lot of the machine and architecture specific language into a more "frienly" set of APIs. What that really means, is it makes it easier for programmers to write things like the shells and GUI tools you use. They no longer need to worry about interacting with the hardware directly, or manipulating memory directly. Rather, the kernel will handle the memory management for them, and the kernel will interact with the hardware for them (like the hard drives, and the keyboard, and the video card and monitor, etc).
So to that point, the kernel isn't really in the background. It's not really in the foreground either. It's sort of the environement that allows there to be a gackground and a foreground.
Does that make sense?0 -
Kernel
Monolithic Kernel
Linux Kernel
Hybrid Kernel
NT Kernel (Windows)
I'll just leave this hear. And if your wondering about Mac - its freeBSD, which is Monolithic Kernel. As a point, You really should google questions like this. Not that we don't mind answering the question, but its more efficient.0 -
Kernel is the heart, we can say. It wont run always. It depends on usage. For simple home applications like music, videos,chats etc., it wont come to play much.
If you are a programmer, then you can drill your kernel with out giving a milli second time of rest.
I dont think so , Kernel is a single program. Group of core modules together form Kernel.
regarding, shell quest, are you sure about assigning a file to a variable ?0 -
linustorvalds wrote:Kernel is the heart, we can say. It wont run always. It depends on usage. For simple home applications like music, videos,chats etc., it wont come to play much.
If you are a programmer, then you can drill your kernel with out giving a milli second time of rest.
I dont think so , Kernel is a single program. Group of core modules together form Kernel.
regarding, shell quest, are you sure about assigning a file to a variable ?
I *REFUSE* to write again the message I just wrote.
You can go ahead and thank the fr***king flood protection.0 -
I *REFUSE* to write again the message I just wrote.
You can go ahead and thank the fr***king flood protection.
can't get what you are telling?0 -
There's a flood protection in the forum system that really annoyes me, that's the thing0
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We've all been hit Marc, if I have a long post going I copy it before submitting. I've lost too many long posts, I've learned my lesson.
Sorry, but they tell me they are working on it.0
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